Cabbage Leather Coral Sinularia Care: Soft Coral Beginner
Cabbage leather coral is the wrinkled, grey-green Sinularia most local shops label simply as “cabbage”. Its folded lobes catch current like lettuce leaves, which is where the common name comes from. This cabbage leather coral sinularia care walkthrough from Gensou Aquascaping at 5 Everton Park gives beginners a realistic picture of long-term husbandry, including the allelopathy issue that catches newer hobbyists out. Healthy colonies rival any SPS display in a properly planned soft-coral reef.
Quick Facts
- Scientific name: Sinularia dura and related folded Sinularia species
- Care level: easy, ideal first soft coral
- Lighting: PAR 80-150, low to moderate
- Flow: moderate, indirect, variable
- Temperature: 24-26 C, salinity 1.024-1.026
- Growth: 3-5 cm of new lobe per month when settled
- Typical Singapore price: $25-60 for a small colony
Species Overview
Cabbage Sinularia belongs to the family Alcyoniidae. Unlike the stalked toadstool leather (Sarcophyton), cabbage colonies grow as stacked folds from a thick encrusting base. They are photosynthetic and supplement through absorbed dissolved organics. In wild reefs across Indonesia and the Solomon Islands, they dominate turbid lagoon shoulders where SPS cannot compete.
Tank Placement
Mid-tower placement on a stable rock works best. Leave a 15 cm clear perimeter; cabbage Sinularia expresses strong allelopathy through terpene release that can stunt nearby SPS and small LPS. In nano reefs under 60 litres, this basically means you commit to a soft-coral-dominant system, which is an aesthetic choice more Singapore hobbyists are embracing.
Water Parameters
Cabbage leathers tolerate a wide nutrient range. Keep alkalinity 7-9 dKH, calcium 400-440 ppm, and magnesium 1300 ppm. Nitrate between 5-15 ppm actually improves colour and polyp extension. Do not chase ultra-low nutrients; recipe-driven tanks starve soft corals.
Lighting
Medium light, 80-150 PAR at the coral top, is ample. Over-lighting causes the colony to shrink and shed its outer tissue in a waxy slime. If you run high-output reef LEDs, keep the cabbage on the lower third of the rockwork. A 9-hour photoperiod is a sensible Singapore default; aircon-warmed rooms already push photosynthesis harder than cooler climates.
Flow and Movement
Look for gentle, turbulent current. Direct powerhead blast compresses the folds and invites detritus trapping. A randomised wavemaker at 20-30% of its rated flow, bounced off the glass, works well. When flow is right, the lobes sway like a cabbage patch in a breeze.
Allelopathy and Chemical Warfare
This is the single most important Sinularia management topic. Cabbage leather coral releases diterpenes into the water that suppress stony-coral tissue. Mitigate with:
- Large weekly water changes (10-15%)
- Continuous activated carbon run at 100 ml per 100 litres, refreshed monthly
- A properly sized protein skimmer
- Physical separation of at least 15-20 cm from LPS and SPS
Shedding Behaviour
Once a month, your cabbage will look sick for a day or two. It closes up, secretes a waxy film, and sloughs it off to shed algae and bacteria. Do not panic or remove the coral. Blow off the film with a turkey baster once it detaches and normal polyp extension returns within 48 hours.
Feeding
Supplemental feeding is optional. Reef roids or phytoplankton once a week, lightly dosed, boosts growth. Target feeding is unnecessary because polyps are tiny and primarily absorb dissolved organics.
Propagation
Snip a lobe with sharp scissors, place it on a ceramic plug in a mesh cradle, and keep flow low for a fortnight. New attachments heal quickly in Singapore’s warm water and fraggers often trade pieces on Carousell for $10-15.
Buying in Singapore
Thomson and Clementi marine shops usually have cabbage Sinularia on rotation at $25-60. Select colonies with uniform colour, no bleached patches, and active polyp extension under shop lights. Follow our drip acclimation protocol on arrival.
Related Reading
More soft-coral and reef-husbandry reading from Gensou Aquascaping Singapore:
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Still Have Questions About Your Tank?
Drop by Gensou Aquascaping — most walk-in questions get answered in under 10 minutes by someone who has set up hundreds of tanks.
5 Everton Park #01-34B, Singapore 080005 · Open daily 11am – 8pm
